典型多环麝香在土壤-小麦系统的对映体选择性环境行为研究

发布时间：2018-05-31 17:53

本文选题：多环麝香 + 气质联用法　；参考：《农业环境科学学报》2017年11期

【摘要】：佳乐麝香(HHCB)和吐纳麝香(AHTN)是多环麝香中使用最广泛的两种手性化合物,采用Agilent Cyclosil-B和HP-5MS毛细管柱串联,在气质联用仪上对两种多环麝香的对映体进行了同时拆分;采用盆栽实验,以HHCB和AHTN商业标准外消旋品中的对映体比率(ERs)作为参照,对小麦幼苗及根际土中HHCB和AHTN的ERs进行分析。结果表明:根际土中HHCB的ERtrans和ERcis值分别为1.13和1.09;小麦体内HHCB的ERtrans和ERcis值分别为1.32~1.50和1.17~1.57,且茎和叶中的对映体比率显著高于外消旋品。根际土中AHTN的ERs值为1.06;小麦体内AHTN的ERs值为1.46~1.68,与外消旋品有显著差异。上述研究结果说明HHCB和AHTN在根际土中发生对映体选择性降解的能力很低,但易于在小麦体内发生对映体选择性吸收,且(4S,7R)-HHCB、(4S,7S)-HHCB和3R-AHTN是小麦体内容易吸收累积的类型。
[Abstract]:Musk musk (HHCB) and musk (AHTN) are the two most widely used chiral compounds in polycyclic musk, in series with Agilent Cyclosil-B and HP-5MS capillary column, and the enantiomers of two kinds of polycyclic musk are simultaneously separated on GC-MS, and the enantiomers in HHCB and AHTN commercial standard racemes are tested by pot culture. The ratio (ERs) was used as a reference to analyze the ERs of HHCB and AHTN in wheat seedlings and rhizosphere soil. The results showed that the ERtrans and ERcis values of HHCB in rhizosphere soil were 1.13 and 1.09 respectively. The ERtrans and ERcis values of HHCB in wheat were 1.32~1.50 and 1.17~1.57, and the ratio of enantiomers in stem and leaf was significantly higher than that in the outer raceme. The ERs value is 1.06, and the ERs value of AHTN in the wheat is 1.46~1.68, and there is a significant difference with the raceme. The results show that the ability of HHCB and AHTN to selectively degrade the enantiomers in the rhizosphere soil is very low, but it is easy to take selective absorption of enantiomers in the wheat, and (4S, 7R) -HHCB, (4S, 7S) -HHCB and it is easy to absorb in the wheat. The type of accumulation.
【作者单位】：南开大学环境科学与工程学院教育部环境污染过程与基准重点实验室;
【基金】：国家自然科学基金项目(21207068,21037002,U1133006) 天津市自然科学基金项目(17JCQNJC08400)~~
【分类号】：X503.231;X53

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